foo.cc: In function 'int main()':
foo.cc:12:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
foo.cc:15:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &num[i]);
         ~~~~~^~~~~~~~~~~~~~~

自豪的采用 HydroJudge 进行评测(github.com/hydro-dev/HydroJudge)

{"receive":"2020-07-12T07:52:52.609Z","handle":"2020-07-12T07:52:52.609Z","cache_start":"2020-07-12T07:52:52.614Z","read_cases":"2020-07-12T07:52:52.729Z","judge":"2020-07-12T07:52:52.731Z","done":"2020-07-12T07:52:53.196Z"}